Block FIR decision-feedback equalizers for filterbank precoded transmissions with blind channel estimation capabilities
Block FIR decision-feedback equalizers for filterbank precoded transmissions with blind channel estimation capabilities
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DOI：
10.1109/26.898252
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
A. Stamoulis;G. Giannakis;A. Scaglione
中科院分区：
文献类型：
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作者：
A. Stamoulis;G. Giannakis;A. Scaglione
在块传输系统中，使用有限脉冲响应（FIR）滤波器组的发射机引起的冗余可用于抑制码间干扰并均衡FIR信道，而不管信道零点。在接收机端，可以应用线性或判决反馈（DF）FIR滤波器组来恢复传输的数据。推导出FIR线性或DF滤波器组接收机对应于不同的传输冗余量的封闭形式的表达式。我们的框架包括现有的块传输方案，并提供低实现成本的均衡技术，当块间干扰被消除时，以及当IBI存在时，例如，在循环前缀不足的正交频分复用中。通过应用盲信道估计方法，我们的滤波器组发射机-接收机（收发机）免除了带宽消耗的训练序列。大量的模拟说明了我们的设计的优点。
In block transmission systems, transmitter-induced redundancy using finite-impulse response (FIR) filterbanks can be used to suppress intersymbol interference and equalize FIR channels irrespective of channel zeros. At the receiver end, linear or decision-feedback (DF) FIR filterbanks can be applied to recover the transmitted data. Closed-form expressions are derived for the FIR linear or DF filterbank receivers corresponding to varying amounts of transmission redundancy. Our framework encompasses existing block transmission schemes and offers low implementation-cost equalization techniques both when interblock interference is eliminated, and when IBI is present as, e.g., in orthogonal frequency-division multiplexing with insufficient cyclic prefix. By applying blind channel estimation methods, our filterbank transmitters-receivers (transceivers) dispense with bandwidth consuming training sequences. Extensive simulations illustrate the merits of our designs.